The F-22 can supercruise at Mach 1.72, and has a top speed of Mach 2.42 (though it may actually go faster).
Congress currently plans to buy only about 165 F-22s, down dramatically from the 750 originally envisioned.
The F-22 is designed to do far more than take out enemy radar installations, though that would indeed be one of its strong points. It routinely outfights F-15s at a 5-1 ratio during combat exercises.
As others have pointed out, this test indicates that the F-22 will be able to take out targets while traveling at altitudes and velocitites that will make the airplane extremely difficult to acquire, let alone engage.
Exactly, your post is right on. And also, something that is not talked about much, the F-22 can carry good anti-ship weapons also, so a few of them, flying in formation at night, over open water, could take out a large task force of enemy naval vesels, like say, CHINESE SHIPS, with one pass, and the chinese wouldn't even get a shot off at the Raptors, they'd just be on fire and sinking. That's why I'd love to see a squadron of Raptors on each Nimitz carrier, or at least a flight of six. That would give each carrier arm a cabability of all weather radar invisible fighters who are superior to any air opposition they might face, while also taking on the mission of being anti-ship bombers, currently being carried by the F/A-18 Hornets and Super Hornets, and previously the A-6E Intruder. The F-22 could sure be a powerfully potent anti-ship weapon also, and were we to base a couple squadrons of those in Taiwan, I sure wouldn't want to be on any Chinese fleet that attempted an invasion. The 22 can be an amazing deterrant just because of the fact it is so far advanced over anything else, and letting the enemy know that is a great thing.